ENGINEERING THERMODYNAMICS QUIZ

Producer gas is obtained by

Passing steam over incandescent coke

Carbonization of bituminous coal

Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast

Passing air and a large amount of steam over waste coal at about 650°C

TRUE ANSWER : ?
YOUR ANSWER : ?

The efficiency of the Carnot cycle may be increased by

Keeping the lowest temperature constant

Increasing the highest temperature

Increasing the lowest temperature

Decreasing the highest temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

Characteristic gas constant of a gas is equal to

Cp + Cv

Cp /Cv

Cv /Cp

Cp - Cv

TRUE ANSWER : ?
YOUR ANSWER : ?

Gases have

Two values of specific heat

Under some conditions one value and sometimes two values of specific heat

Only one value of specific heat

No value of specific heat

TRUE ANSWER : ?
YOUR ANSWER : ?

The efficiency of Diesel cycle approaches to Otto cycle efficiency when

Cut-off is increased

Cut-off is constant

Cut-off is decreased

Cut-off is zero

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is an irreversible cycle?

Carnot

Stirling

Ericsson

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The calorific value of gaseous fuel is expressed in

kJ

kJ/kg

kJ/m2

kJ/m3

TRUE ANSWER : ?
YOUR ANSWER : ?

Work done in a free expansion process is

Zero

Maximum

Minimum

Positive

TRUE ANSWER : ?
YOUR ANSWER : ?

Properties of substances like pressure, temperature and density, in thermodynamic coordinates are

Real functions

Point functions

Cyclic functions

Path functions

TRUE ANSWER : ?
YOUR ANSWER : ?

The kinetic energy per kg molecule of any gas at absolute temperature T is equal to (where Ru = Universal gas constant)

2 Ru × T

Ru × T

1.5 Ru × T

3 Ru × T

TRUE ANSWER : ?
YOUR ANSWER : ?

↑